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Technical details about Calcium Carbonate, learn more about the structure, uses, toxicity, action, side effects and more

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2D Structure
Also known as: Aragonite, 471-34-1, Limestone, Calcite, Chalk, Carbonic acid calcium salt (1:1)
Molecular Formula
CCaO3
Molecular Weight
100.09  g/mol
InChI Key
VTYYLEPIZMXCLO-UHFFFAOYSA-L
FDA UNII
H0G9379FGK

Carbonic acid calcium salt (CaCO3). An odorless, tasteless powder or crystal that occurs in nature. It is used therapeutically as a phosphate buffer in hemodialysis patients and as a calcium supplement.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
calcium;carbonate
2.1.2 InChI
InChI=1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
2.1.3 InChI Key
VTYYLEPIZMXCLO-UHFFFAOYSA-L
2.1.4 Canonical SMILES
C(=O)([O-])[O-].[Ca+2]
2.2 Other Identifiers
2.2.1 UNII
H0G9379FGK
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Aragonite

2. Calcite

3. Calcium Milk

4. Carbonate, Calcium

5. Chalk

6. Limestone

7. Marble

8. Milk Of Calcium

9. Vaterite

2.3.2 Depositor-Supplied Synonyms

1. Aragonite

2. 471-34-1

3. Limestone

4. Calcite

5. Chalk

6. Carbonic Acid Calcium Salt (1:1)

7. Aeromatt

8. Calciumcarbonate

9. Calcium Carbonate (1:1)

10. Calofort U

11. Calcite (ca(co3))

12. Precipitated Calcium Carbonate

13. 1317-65-3

14. Marble Dust

15. Caco3

16. Calciumcarbonat

17. Glauberitum

18. Kalziumkarbonat

19. Calcitum

20. Calcium Carbonate Slurry

21. Hydrolyzed Pearl

22. Calcium Carbonate, Powder

23. Ci 77220

24. Han Shui Shi

25. Kohlensaurer Kalk

26. Limestone, Ground

27. Carbonato De Calcio

28. Chalk, Precipitated

29. Carbonate De Calcium

30. Phx Cal-carb Buffer

31. Calcium (as Carbonate)

32. Calcium Trioxidocarbonate

33. Calcium Carbonate [usp]

34. Carbonate (calcium)

35. Marble

36. Precpitated Calcium Carbonate

37. Kalkspar

38. Calcium (as Calcium Carbonate)

39. Chebi:3311

40. H0g9379fgk

41. Ins No.170(i)

42. Ins-170(i)

43. Mfcd00010906

44. Akadama

45. Albacar

46. Albafil

47. Albaglos

48. Atomite

49. Calcicoll

50. Calibrite

51. Calmote

52. Calseeds

53. Calwhite

54. Carbium

55. Chemcarb

56. Clefnon

57. Duramite

58. E-170(i)

59. Hydrocarb

60. Kotamite

61. Microcarb

62. Micromya

63. Neoanticid

64. Atomit

65. Calmos

66. Caltec

67. Dacote

68. Marfil

69. Levigated Chalk

70. Allied Whiting

71. Tums

72. Marble White

73. Calcium Carbonate (usp)

74. Camel-carb

75. Camel-wite

76. Camel-tex

77. Britomya M

78. Britomya S

79. Calofort S

80. Calofort T

81. Calopake F

82. Calopake H

83. Hakuenka O

84. Multiflex Mm

85. Multiflex Sc

86. Albaglos Sf

87. Calopake Fs

88. Calopake Pc

89. Carusis P

90. Garolite Sa

91. Gilder's Whiting

92. Hakuenka Cc

93. Hakuenka Dd

94. Hakuenka Px

95. Hakuenka Pz

96. Homocal D

97. Multifex Mm

98. Neolite F

99. Calcene Co

100. Calcene Nc

101. Calcene Tm

102. Carbium Mm

103. Hakuenka Ccr

104. Neolite Sp

105. Crystic Prefil S

106. Neolite Tps

107. Calcilit 8

108. Carborex 2

109. Cal-sup

110. Microwhite 25

111. R Jutan

112. Calcium Carbonate Nanopowder

113. Hakuenka T-dd

114. Brilliant 15

115. Filtex White Base

116. Hydrocarb 60

117. Hydrocarb 65

118. Marblewhite 325

119. Cal-light Sa

120. Calcidar 40

121. Carbital 90

122. Durcal 2nh

123. Non-fer-al

124. Ccc G-white

125. Kredafil Rm 5

126. Brilliant Br 15

127. Calofil A 4

128. Calofil B 1

129. Calofil E 2

130. C.i. Pigment White 18

131. Calcilit 100

132. Hakuenka R 06

133. Micromic Cr 16

134. Calcium Monocarbonate

135. Durcal 10

136. Durcal 40

137. Monocalcium Carbonate

138. Brilliant 1500

139. Calofor U 50

140. Calopake High Opacity

141. Ccc No.aa Oolitic

142. Eskalon 100

143. Eskalon 200

144. Eskalon 400

145. Eskalon 800

146. Finncarb 6002

147. C 50 (carbonate)

148. Kredafil 150 Extra

149. Albacar 5970

150. Caswell No. 139

151. Eskalon 1500

152. Msk-po

153. Msk-c

154. Msk-g

155. Msk-k

156. Msk-p

157. Msk-v

158. Ncc-p

159. Slaker Rejects

160. Mylanta Soothing Lozenges

161. Natural Calcium Carbonate

162. Oyster Shell

163. Ground Limestone

164. Mc-t

165. Calcium, Reference Standard Solution

166. Durcal C 640305

167. P-lite 500

168. P-lite 700

169. Di-gel Tablets

170. Carbonic Acid Calcium Salt

171. Precipitated Chalk

172. Egri M 5

173. Pigment White 18

174. Kulu 40

175. Calcium Carbonate, Precipitated

176. Brt 30

177. Ccris 1333

178. Hsdb 927

179. Ncc 45

180. Tylenol Headache Plus

181. Bs 32

182. Vaterite (ca(co3))

183. Brt 1500

184. Carbonic Acid, Calcium Salt (1:1)

185. Einecs 207-439-9

186. Ax 363

187. Bf 200

188. Ks 500

189. Ns 100

190. Ns 200

191. Ns 400

192. Epa Pesticide Chemical Code 073502

193. Ks 1300

194. Ks 1500

195. Ks 1800

196. Ks 2100

197. Ns 2500

198. Unii-h0g9379fgk

199. N 34

200. N 43

201. Caltan

202. Calcii Carbonas

203. Kalk

204. Chalk Powder

205. Coral Calcium

206. Marble Chips

207. Carbonate Calcium

208. C.i. 77220

209. K 250

210. Calcium Carb Onate

211. Copper Nickel Foil

212. Marble, Cp

213. T 130-2500

214. Cal-sup (tn)

215. Calcium(ii) Carbonate

216. Calcium Carbonate, Cp

217. Calcium Carbonate,(s)

218. Acid Controller Complete

219. Calcite [inci]

220. Calcium Carbonate (as)

221. Chalk [inci]

222. Chalk [who-dd]

223. Ec 207-439-9

224. Schembl3261

225. Calcium Carbonate Dispersion

226. Calcium Carbonate Granular Dc

227. Calcium Carbonate Precipitated

228. Ca (c O3)

229. Calcium Carbonate [ii]

230. Calcium Carbonate [mi]

231. Calcium Carbonate Nanoparticles

232. Ndi 443 [fdms]

233. Calcium Carbonate [fcc]

234. Calcium Carbonate Microparticles

235. Hydrolyzed Pearl [inci]

236. Calcium Carbonate [hsdb]

237. Calcium Carbonate [inci]

238. Chembl1200539

239. Dtxsid3036238

240. Limestone, Ground [fcc]

241. Calcium Carbonate [vandf]

242. Ndi 443

243. Calcium Carbonate [mart.]

244. Calcium Carbonate, Reagentplus(r)

245. Calcium Carbonate,puratronic Powder

246. Ci 77220 [inci]

247. Calcium Carbonate [usp-rs]

248. Calcium Carbonate [who-dd]

249. Calcium Carbonate [who-ip]

250. Calcium Carbonate, Ar, >=98.5%

251. Calcium Carbonate, Lr, >=98.5%

252. Akos015903256

253. Calcium Carbonate, Precipitated (jan)

254. Calcii Carbonas [who-ip Latin]

255. Calcium Carbonate [orange Book]

256. Calcium Carbonate, Chelometric Standard

257. Children's Mylanta Upset Stomach Relief

258. Db06724

259. Precipitated Calcium Carbonate (jp17)

260. Calcium (as Carbonate) [vandf]

261. Calcium Carbonate [ep Monograph]

262. Calcium Carbonate, Bioxtra, >=99.0%

263. Calcium Carbonate, Monocalcium Carbonate

264. Calcium Carbonate [usp Monograph]

265. 13701-58-1

266. Calcium Carbonate, Powder A.c.s. Reagent

267. E170

268. Precpitated Calcium Carbonate [jan]

269. Calcium Carbonate, Puriss. P.a., >=99%

270. Calcium Carbonate, Usp, 98.0-100.5%

271. Calcium Carbonate, Nist(r) Srm(r) 915b

272. E 170

273. Ft-0623383

274. Calcium Carbonate (99.999%-ca) Puratrem

275. C08129

276. Calcium (as Calcium Carbonate) [vandf]

277. Calcium Carbonate, Saj First Grade, >=98.0%

278. Calcium Carbonate, Tested According To Ph.eur.

279. D00932

280. Q23767

281. Calcium Carbonate, 99.999% Trace Metals Basis

282. Calcium Carbonate, Jis Special Grade, >=99.5%

283. Calcium Carbonate, P.a., 99.0%, Acs Reagent

284. Calcium Carbonate Dc (spray Dried) [ndi]

285. Calcium Carbonate, >=99.995% Trace Metals Basis

286. Calcium Carbonate, Vetec(tm) Reagent Grade, 99%

287. Pepcid Complete Component Calcium Carbonate

288. Calcium Carbonate, Acs Reagent, >=99.0%, Powder

289. Calcium Carbonate Component Of Pepcid Complete

290. Calcium Carbonate, Bioultra, Precipitated, >=99.0% (kt)

291. Calcium Carbonate, Powder, <=30 Mum Particle Size, 98%

292. Calcium Carbonate, Primary Reference Standard, 99.95-100.05%

293. Nbs 18 (carbon Isotopes In Carbonatite), Nist(r) Rm 8543

294. Calcium Carbonate, Trace Metals Grade 99.99% Trace Metals Basis

295. Calcium Carbonate (as), United States Pharmacopeia (usp) Reference Standard

296. Calcium Carbonate, Bioreagent, Suitable For Insect Cell Culture, >=99.0%

297. Calcium, Ion Chromatography Standard Solution, Specpure?, Ca2+ 1000?g/ml

298. Calcium Carbonate, Acs Reagent, Chelometric Standard, 99.95-100.05% Dry Basis

299. Calcium Carbonate, Anhydrous, Free-flowing, Redi-dri(tm), Acs Reagent, >=99%

300. Calcium Carbonate, Anhydrous, Free-flowing, Redi-dri(tm), Reagentplus(r), >=99%

301. Calcium Carbonate, Pharmaceutical Secondary Standard; Certified Reference Material

302. Calcium Carbonate, Certified Reference Material For Titrimetry, Certified By Bam, According To Iso 17025, >=99.5%

303. Calcium Carbonate, Puriss., Meets Analytical Specification Of Ph. Eur., Bp, Usp, Fcc, E170, Precipitated, 98.5-100.5% (based On Anhydrous Substance)

2.4 Create Date
2004-09-16
3 Chemical and Physical Properties
Molecular Weight 100.09 g/mol
Molecular Formula CCaO3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass99.9473347 g/mol
Monoisotopic Mass99.9473347 g/mol
Topological Polar Surface Area63.2 Ų
Heavy Atom Count5
Formal Charge0
Complexity18.8
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count2
4 Drug and Medication Information
4.1 Therapeutic Uses

Mesh Heading: Antacids

National Library of Medicine, SIS; ChemIDplus Record for Calcium Carbonate (471-34-1).>> Available from, as of April 17, 2006: https://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp


/EXPL THER/ The aim of the present study was to test the hypothesis that a fibrin matrix enhances the osteogenic differentiation and expression of vascular endothelial growth factor (VEGF) by human bone marrow stromal cells (hBMSCs) seeded into mineralised scaffolds. Porous calcium carbonate scaffolds were droplet seeded with hBMSCs using a matrix containing 3 % fibrinogen and cultured for 3 weeks. Seeded scaffolds without the fibrin matrix served as controls. The scaffolds were evaluated, using undecalcified thick sections, for fluorescence staining for nuclei, osteocalcin (OC) and VEGF. The sections were systematically scanned using optical sectioning and three dimensional distributions of cells and positive staining indicating expression of OC and VEGF were reconstructed from the z-stacks. The fibrin matrix maintained a significantly higher level of cell numbers after 2 d and 1 week and delayed the onset of osteogenic differentiation while sustaining a significantly higher level of OC and VEGF expression after 2 and 3 weeks, starting from the periphery of the scaffolds. There was a decrease in cell density from the periphery to the centre of the scaffolds in both groups. The percentage of cells expressing OC and VEGF was significantly different between the centre and the periphery of the scaffolds in the fibrin(+) group but not in the controls. It is concluded that the fibrin matrix used appears to be a useful adjunct for supporting and sustaining osteogenic and angiogenic activity of hBMSCs in tissue engineered constructs. This could help to improve their performance in a clinical setting.

PMID:22665163 Lohse N et al; Eur Cell Mater. 23: 413-23 (2012)


/EXPL THER/ Thirty coral-derived calcium carbonate-based macroporous constructs with limited hydrothermal conversion to hydroxyapatite (7% HA/CC) were implanted in the rectus abdominis of three adult non-human primate Papio ursinus to investigate the intrinsic induction of bone formation. Macroporous constructs with 125 ug human recombinant osteogenic protein-1 (hOP-1) or 125 ug human recombinant transforming growth factor-beta(3) (hTGF-beta(3)) were also implanted. The potential synergistic interaction between morphogens was tested by implanting binary applications of hOP-1 and hTGF-beta(3) 5:1 by weight, respectively. To evaluate the role of osteoclastic activity on the implanted macroporous surfaces, coral-derived constructs were pre-loaded with 0.24 mg of bisphosphonate zoledronate (Zometa). To correlate the morphology of tissue induction with osteogenic gene expression and activation, harvested specimens on day 90 were analyzed for changes in OP-1 and TGF-beta(3) mRNA synthesis by quantitative real-time polymerase chain reaction (qRT-PCR). The induction of bone formation in 7% HA/CC solo correlated with OP-1 expression. Massive bone induction formed by binary applications of the recombinant morphogens. Single applications of hOP-1 and hTGF-beta(3) also resulted in substantial bone formation, not comparable however to synergistic binary applications. Zoledronate-treated macroporous constructs showed limited bone formation and in two specimens bone formation was altogether absent; qRT-PCR showed a prominent reduction of OP-1 gene expression whilst TGF-beta(3) expression was far greater than OP-1. The lack of bone formation by zoledronate-treated specimens indicates that osteoclastic activity on the implanted coral-derived constructs is critical for the spontaneous induction of bone formation. Indirectly, zoledronate-treated samples showing lack of OP-1 gene expression and absent or very limited bone formation by induction confirm that the spontaneous induction of bone formation by coral-derived macroporous constructs is initiated by secreted BMPs/OPs, in context the OP-1 isoform.

PMID:20493522 Ripamonti U et al; Biomaterials. 31 (25): 6400-10 (2010)


/EXPL THER/ Calcium is an essential cotherapy in osteoporosis treatment. The relative effectiveness of various calcium salts for this purpose is uncertain. Many older women with osteoporosis have phosphorus intakes of <70% of the Recommended Dietary Allowance. /The study's/ objective was to test the hypothesis that calcium phosphate would better support anabolic bone building than would calcium carbonate. This study was a 12-mo, randomized, positive-comparator, 2-arm, single-blind clinical trial in 211 patients treated with teriparatide who consumed <1000 mg phosphorus/d. Participants were randomly assigned to receive, in addition to teriparatide and 1000 IU cholecalciferol, 1800 mg calcium/d as either tricalcium phosphate or calcium carbonate. The primary endpoints were changes in lumbar spine and total hip bone mineral densities (BMDs); secondary endpoints were changes in bone resorption biomarkers and serum and urine calcium and phosphorus concentrations. In the combined group, the lumbar spine BMD increased by 7.2%, and total hip BMD increased by 2.1% (P < 0.01 for both). However, there was no significant difference between calcium-treatment groups, and there were no significant between-group differences in serum calcium and phosphorus concentrations or in urine calcium concentrations. Bone resorption biomarkers increased in both groups, as expected with teriparatide, but the increases in the 2 calcium groups did not differ significantly.Tricalcium phosphate and calcium carbonate appear to be approximately equally effective in supporting bone building with a potent anabolic agent; phosphate salt may be preferable in patients with restricted phosphorus intakes.

PMID:20484446 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2884321 Heaney RP et al; Am J Clin Nutr. 92 (1): 101-5 (2010)


For more Therapeutic Uses (Complete) data for CALCIUM CARBONATE (20 total), please visit the HSDB record page.


4.2 Drug Warning

Large doses of calcium carbonate (above 2 g) increase gastric secretion for a period of time that considerably outlasts elevation of pH. ... With single doses below 2 g, this effect is negligible.

Osol, A. and J.E. Hoover, et al. (eds.). Remington's Pharmaceutical Sciences. 15th ed. Easton, Pennsylvania: Mack Publishing Co., 1975., p. 733


After ingestion /of CaCO3 tablets/, it is converted to sol calcium salts in bowel, and calcium is thereby made available for absorption. Patients with achlorhydria may not solubilize calcium from ... preparation.

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 1528


Gastric hypersecretory action is counter productive and may possibly account for various reports that calcium carbonate is less efficacious than other antacids. Calcium carbonate has been known to cause fecal concretions.

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 993


Constipating effects and chalky taste of calcium carbonate are clinically disadvantageous.

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 993


For more Drug Warnings (Complete) data for CALCIUM CARBONATE (23 total), please visit the HSDB record page.


4.3 Drug Indication

For relief of heartburn and acid indigestion. May also be used as a nutritional supplement or to treat hypocalcemia.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Gastric-peptic disease occurs as a result of an imbalance between protective factors, such as mucus, bicarbonate, and prostaglandin secretion, and aggressive factors, such as hydrochloric acid, pepsin, and Helicobacter pylori (H. pylori). Antacids work by restoring acid-base balance, attenuating the pepsin activity and increasing bicarbonate and prostaglandin secretion. The acid-neutralizing capacity of calcium carbonate is 58 mEq/15 ml. When used as a nutritional supplement, calcium carbonate acts by directly increasing calcium stores within the body.


5.2 MeSH Pharmacological Classification

Antacids

Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT. (See all compounds classified as Antacids.)


5.3 FDA Pharmacological Classification
5.3.1 Pharmacological Classes
Calcium [CS]; Cations, Divalent [CS]; Increased Coagulation Factor Activity [PE]; Blood Coagulation Factor [EPC]
5.4 ATC Code

A - Alimentary tract and metabolism

A02 - Drugs for acid related disorders

A02A - Antacids

A02AC - Calcium compounds

A02AC01 - Calcium carbonate


A - Alimentary tract and metabolism

A12 - Mineral supplements

A12A - Calcium

A12AA - Calcium

A12AA04 - Calcium carbonate


5.5 Absorption, Distribution and Excretion

Absorption

Maximal absorption occurs at doses of 500 mg or less taken with food. Oral bioavailability depends on intestinal pH, the presence of food and dosage.


Route of Elimination

Excreted mainly in the feces. The majority of renally filtered calcium is reabsorbed in the ascending limb of the loop of Henle and the proximal and distal convoluted tubules. Also secreted by sweat glands.


Volume of Distribution

Calcium is rapidly distributed taken up by skeletal tissues following absorption and distribution into extracellular fluids. Bone contains 99% of the body's calcium and the remaining 1% is approximately equally distributed between intracellular and extracellular fluids.


Calcium absorption is best when a person consumes no more than 500 mg at one time. So a person who takes 1,000 mg/day of calcium from supplements, for example, should split the dose rather than take it all at once.

NIH Office of Dietary Supplements. Dietary Supplement Fact Sheet for Calcium. Available from, as of August 26, 2013: https://ods.od.nih.gov/factsheets/Calcium-QuickFacts/


Amount of calcium absorbed from calcium carbonate is usually stated to be 10%, but ... depends upon amount of gastric acid; in 1 study, 0-2% of single 2 g dose was ... absorbed in achlorhydric persons, 9-16% in normal subjects, and 11-37% in patients with peptic ulcer ...

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 992


Fraction absorbed seems to be nearly the same when CaCO3 is given chronically in daily doses of 20 g /as when it is given in single 2 g dose/. ... Amount absorbed probably reaches a plateau at a dose of about 20 g.

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 992


... Increased calcium excretion almost always follows admin of antacid doses of calcium carbonate ...

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 992


For more Absorption, Distribution and Excretion (Complete) data for CALCIUM CARBONATE (15 total), please visit the HSDB record page.


5.6 Metabolism/Metabolites

None.


After ingestion /of CaCO3 tablets/, it is converted to sol calcium salts in stomach, and calcium is thereby made available for absorption.

Gilman, A. G., L. S. Goodman, and A. Gilman. (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 6th ed. New York: Macmillan Publishing Co., Inc. 1980., p. 1528


5.7 Mechanism of Action

Calcium carbonate is a basic inorganic salt that acts by neutralizing hydrochloric acid in gastric secretions. It also inhibits the action of pepsin by increasing the pH and via adsorption. Cytoprotective effects may occur through increases in bicarbonate ion (HCO3-) and prostaglandins. Neutralization of hydrochloric acid results in the formation of calcium chloride, carbon dioxide and water. Approximately 90% of calcium chloride is converted to insoluble calcium salts (e.g. calcium carbonate and calcium phosphate).


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